EP 1933406 A1 20080618 - SEPARATOR MATERIAL FOR FUEL CELL AND PROCESS FOR PRODUCING THE SAME
Title (en)
SEPARATOR MATERIAL FOR FUEL CELL AND PROCESS FOR PRODUCING THE SAME
Title (de)
TRENNGLIEDMATERIAL FÜR EINE BRENNSTOFFZELLE UND PROZESS ZU SEINER HERSTELLUNG
Title (fr)
MATÉRIAU DE SÉPARATION POUR UNE PILE À COMBUSTIBLE ET PROCÉDÉ POUR LE PRODUIRE
Publication
Application
Priority
- JP 2006320355 W 20061005
- JP 2005294670 A 20051007
Abstract (en)
A fuel cell separator material which exhibits excellent electrical conductivity, high gas impermeability, high strain at break, and excellent strength, and a process of producing the same are disclosed. The fuel cell separator material includes a graphite/cured resin molded product obtained by binding spherical natural graphite particles with a thermosetting resin, the spherical natural graphite particles being prepared by spheroidizing natural flake graphite having an average particle diameter of 1 to 50 µm by dry impact blending, and having an average particle diameter of 20 to 100 µm, a particle density measured in water of 2 g/cm 3 or more, and a compression recovery rate when pressurized at 50 MPa of 120% or less, and a density during compression of 1.9 g/cm 3 . The process includes preparing spherical natural graphite particles having the above properties, mixing the spherical natural graphite particles and a thermosetting resin so that the weight ratio of the graphite particles and the solid content of the resin is 90:10 to 65:35, drying and grinding the mixture to prepare a molding powder, filling a mold provided with protrusions for forming gas passages with the molding powder, and thermocompression-molding the molding powder at a temperature of 120°C or more and a pressure of 20 to 100 MPa.
IPC 8 full level
H01M 8/02 (2006.01)
CPC (source: EP KR US)
H01M 8/02 (2013.01 - KR); H01M 8/0213 (2013.01 - EP US); H01M 8/0221 (2013.01 - EP US); H01M 8/0226 (2013.01 - EP US); H01M 8/086 (2013.01 - EP US); H01M 2008/1095 (2013.01 - EP US); Y02E 60/50 (2013.01 - EP); Y02P 70/50 (2015.11 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1933406 A1 20080618; EP 1933406 A4 20110323; CA 2623566 A1 20070419; CN 101283471 A 20081008; CN 101283471 B 20100414; JP 2007103282 A 20070419; JP 5057260 B2 20121024; KR 101306488 B1 20130909; KR 20080046235 A 20080526; TW 200746525 A 20071216; TW I389380 B 20130311; US 2009267250 A1 20091029; WO 2007043600 A1 20070419; WO 2007043600 A9 20070628
DOCDB simple family (application)
EP 06811652 A 20061005; CA 2623566 A 20061005; CN 200680037370 A 20061005; JP 2005294670 A 20051007; JP 2006320355 W 20061005; KR 20087008564 A 20061005; TW 95136665 A 20061003; US 99237406 A 20061005